The 2018 World Junior Hockey Championship got its first major upset Thursday as Slovakia pulled out a 3-2 victory over the United States.

Samuel Bucek scored the game-winning goal with 2:08 remaining in regulation and Filip Krivosik tallied two goals to lead the Slovaks to their first win of the tournament.

In a wild third period, Slovakia took a 2-1 lead with 4:45 left on Krivosik's second goal of the game.

However, the lead was short-lived. Buffalo Sabres prospect Casey Mittelstadt temporarily tied the contest with the early goal of the tournament, putting the puck between his legs before undressing multiple Slovak defenders and goaltender Roman Durny.

Nevertheless, Durny was the difference-maker for the Slovaks, as he turned away 43 shots to earn player of the game honors. Toronto Maple Leafs prospect Joseph Woll was less inspiring in his second start of the tournament, making 22 saves on 25 shots.

The Americans have a quick turnaround, as they will be back in action at 3:00 p.m. ET Friday when they take on Canada in the tournament's first-ever outdoor game.

Meanwhile, Slovakia will enjoy a day off before facing Finland on Saturday.

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